The SBU said it had exposed the gunners of the Russian Iskander strike at the wake in Hroza, where 55 people were killed. Security officials immediately reported that the attack could have been directed by someone.

The agency said that in hot pursuit, they identified two suspected locals - 30-year-old Volodymyr Mamon and his younger brother, 23-year-old Dmytro Mamon, who defected to the Russian Federation during the occupation of the region.

They reportedly received "positions" in the Russian "administration of the Kharkiv region" in return: "convoy driver" and "road patrol inspector".

According to the SBU, they remotely collected information from their friends about the deployment of the Ukrainian Armed Forces and mass events in the region under the guise of friendly conversations and correspondence. Since the beginning of October, they have been collecting information about the planned reburial of a fallen Ukrainian soldier in the village of Hroza and passed the information to Russia.

"At the same time, they realized that civilians - their acquaintances from the village of Hroza, including those who provided them with information - would surely die as a result of the enemy attack," the statement reads.

The brothers were notified of suspicion in absentia.